package org.openfantasia.musica.instruments.jmusic;

import jm.audio.Instrument;
import jm.audio.io.SampleOut;
import jm.audio.synth.Envelope;
import jm.audio.synth.Filter;
import jm.audio.synth.Oscillator;
import jm.audio.synth.Volume;

/**
 * A monophonic sawtooth waveform instrument implementation
 * <p/>
 * which includes a static high pass filter.
 *
 * @author Andrew Brown
 */

public final class SawHPFInst extends Instrument {

	//----------------------------------------------

	// Attributes

	//----------------------------------------------

	private int sampleRate;

	private int filterCutoff;

	private int channels;

	//----------------------------------------------

	// Constructor

	//----------------------------------------------


	/**
	 * Basic default constructor to set an initial
	 * <p/>
	 * sampling rate and use a default cutoff.
	 *
	 * @param sampleRate
	 */

	public SawHPFInst(int sampleRate) {

		this(sampleRate, 2000);

	}


	/**
	 * Constructor that sets sample rate and the filter cutoff frequency.
	 *
	 * @param sampleRate	 The number of samples per second (quality)
	 * @param filterCutoff The frequency above which overtones are cut
	 */

	public SawHPFInst(int sampleRate, int filterCutoff) {

		this.sampleRate = sampleRate;

		this.filterCutoff = filterCutoff;

		this.channels = 1;

	}

	//----------------------------------------------

	// Methods 

	//----------------------------------------------   


	/**
	 * Initialisation method used to build the objects that
	 * <p/>
	 * this instrument will use and specify their interconnections.
	 */

	public void createChain() {

		Oscillator wt = new Oscillator(this, Oscillator.SAWTOOTH_WAVE,
				this.sampleRate, this.channels);

		Filter filt = new Filter(wt, this.filterCutoff, Filter.HIGH_PASS);

		Envelope env = new Envelope(filt,
				new double[]{0.0, 0.0, 0.05, 1.0, 0.2,
						0.4, 0.8, 0.3, 1.0, 0.0});

		Volume vol = new Volume(env);

		SampleOut sout = new SampleOut(vol);

	}

}



